Rahi Karmarkar, Jos Latour, Joanne Hosking, Somaiah Aroori
{"title":"Current Practices and Perceptions of Indocyanine Green Fluorescence Guided Liver Surgery: Insights from a Survey of Hepato-Pancreato-Biliary Surgeons in the United Kingdom.","authors":"Rahi Karmarkar, Jos Latour, Joanne Hosking, Somaiah Aroori","doi":"10.1007/s10895-024-04022-y","DOIUrl":"https://doi.org/10.1007/s10895-024-04022-y","url":null,"abstract":"<p><p>Indocyanine Green (ICG) fluorescence-guided surgery (I-FIGS) is increasingly being used in hepato-pancreatico-biliary (HPB) surgery. However, the true benefit of I-FIGS, the optimum dosing, and the timing of ICG administration still need to be determined. To conduct future research studies in the above areas, it is essential to understand the current I-FIGS practices among surgeons. This survey investigated the practices and perceptions of I-FIGS in liver surgery among HPB surgeons in the United Kingdom (UK). A survey was sent via email and social media to surgeons from all HPB units in the UK. The survey consisted of 18 questions, covering various aspects such as experience levels, volume of operations, approach to liver resections, ICG dosage, timing of administration, application specifics, camera systems used, and willingness to participate in future trials. The survey was sent to 81 HPB surgeons (working in 25 HPB units) across the UK. The response rate was 70% (57/81 surgeons). 56% of the surgeons reported having the infrastructure for I-FIGS at their hospital. The use of I-FIGS varied in duration and patient volume, with 47% of surgeons reporting its use for less than one year and 53% of surgeons reporting using it in fewer than ten patients. Preferences for the dose and timing of ICG administration also varied, reflecting the absence of standardised guidelines. The Storz camera system emerged as the most used imaging system (42% of surgeons), followed by the Stryker (25.8%). None of the surgeons reported any I-FIGS-related side effects. Ninety-six per cent of surgeons expressed interest in participating in future clinical trials in the field of I-FIGS. The survey highlights that I-FIGS in liver surgery is not widely used in the UK. There are also wide variations in the dosing and timing of ICG administration. Large multi-centre studies are needed to focus on dosing, timing of ICG administration, and establishing its actual role in liver surgery.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Momna Qayyum, Sammia Shahid, Sana Mansoor, Muhammad Faizan, Mohsin Javed, Ammar Zidan, Ali Bahadur, Shahid Iqbal, Sajid Mahmood, Abd-ElAziem Farouk, Salman Aloufi
{"title":"Revolutionizing Fingerprint Detection: Ce<sup>3+</sup> Doped SiO<sub>2</sub>-Zr<sub>2</sub>O<sub>3</sub>:Sr<sup>2+</sup> Nanocomposites with Enhanced Luminescence and Selectivity.","authors":"Momna Qayyum, Sammia Shahid, Sana Mansoor, Muhammad Faizan, Mohsin Javed, Ammar Zidan, Ali Bahadur, Shahid Iqbal, Sajid Mahmood, Abd-ElAziem Farouk, Salman Aloufi","doi":"10.1007/s10895-024-04028-6","DOIUrl":"https://doi.org/10.1007/s10895-024-04028-6","url":null,"abstract":"<p><p>Even though fingerprints remain one of the most reliable methods of identification, they are often lost during the recovery process. Accurate fingerprint recognition depends on the contrast between the ridges and substrate. On tough surfaces, such as glossy, colorful, and patterned materials, the contrast is harder to establish. Photoluminescent materials play a crucial role in forensic investigations as they enable the development of procedures that enhance image quality and increase the accuracy of findings from security institutions. Due to the strong emission in the red area at 620 nm, the use of trivalent Rare Earth ions (RE<sup>3+</sup>) doped materials in this work is notable. Because of the unique properties and abundance of cerium, luminous materials based on SiO<sub>2</sub>-Zr<sub>2</sub>O<sub>3</sub>: Ce<sup>3+</sup>, Sr<sup>2+</sup> prepared via sol-gel technique present a more practical alternative for use in criminal investigations compared to current photonic materials. The sample was further co-doped with synthetic (Safranin-O and crystal violet) as well as organic (curcumin and lycopene) photoluminescent dyes. The nanocomposites were examined using X-ray diffraction analysis (XRD), energy-dispersive X-ray analysis (EDX), dynamic light scattering (DLS), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL). In conclusion, this work highlights the qualities critical to obtaining higher-resolution latent fingerprint images for potential forensic applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A comparative application of spectrophotometric and spectrofluorimetric methods to estimate levofloxacin-DNA and ofloxacin-DNA interactions.","authors":"Asiye Üçer, Zehra Ceren Ertekіn, Erdal Dіnç","doi":"10.1007/s10895-024-04056-2","DOIUrl":"https://doi.org/10.1007/s10895-024-04056-2","url":null,"abstract":"<p><p>Ofloxacin (OFL) and its (S)-enantiomer, levofloxacin (LEV), are among members of the fluoroquinolone antibiotic class, renowned for their broad-spectrum efficacy against both gram-negative and gram-positive bacteria. These potent drugs have been widely used in both human and veterinary medicine, working as bactericidal agents by binding to DNA gyrase, an essential enzyme for bacterial DNA replication. Understanding the binding constants of these drugs to DNA is vital for elucidating their interaction mechanisms and enhancing our grasp of gene expression regulation. The interactions of LEV and OFL with calf thymus DNA under a physiological medium (0.02 M tris-HCl buffer, pH 7.4) using UV spectrophotometry and spectrofluorimetry were investigated. The assay results obtained by applying two spectroscopic approaches confirmed the presence of the interaction of LEV and OFL antibiotics with DNA. In the LEV-DNA and OFL-DNA interactions, hyperchromic effect and fluorescence quenching were observed for UV spectrophotometric and spectrofluorometric measurements, respectively. In the spectrophotometric analysis, the binding constants for the LEV-DNA and OFL-DNA complexes at 298 K were determined as (1.24 ± 0.047) x 10<sup>3</sup> and (1.39 ± 0.040) x 10<sup>3</sup> M<sup>- 1</sup>, respectively. In the spectrofluorimetric analysis of the interaction of LEV and OFL with DNA, the thermodynamic properties were examined at three distinct temperatures. Based on the fluorescence signal changes the binding constants at 293, 298, and 310 K were calculated as (8.91 ± 0.161) x 10<sup>3</sup>, (7.62 ± 0.098) x 10<sup>3</sup>, and (6.08 ± 0.041) x 10<sup>3</sup> M<sup>- 1</sup> for LEV-DNA and, (3.14 ± 0.053) x 10<sup>3</sup>, (3.04 ± 0.031) x 10<sup>3</sup>, and (2.78 ± 0.023) x 10<sup>3</sup> M<sup>- 1</sup> for OFL-DNA, respectively. In these assays, the Gibbs free energy (ΔG<sup>0</sup>), entropy (ΔS<sup>0</sup>), and enthalpy (ΔH<sup>0</sup>) were determined using the Van't Hoff equation. The negative ΔG⁰ values indicate that both LEV-DNA and OFL-DNA interactions are spontaneous. Furthermore, the positive ΔS⁰ and negative ΔH⁰ values revealed that electrostatic forces played a significant role in the binding LEV and OFL to DNA.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142785407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hind A Al-Shwaiman, Rustem R Zairov, Asad Syed, Manjula Subramaniam, Meenakshi Verma, Baadal Jushi Janani, Ramadan Fallah Amer
{"title":"Feasible Preparation of Naphthalimide-Functionalized Zeolitic Imidazolate Framework-8 for Control, and Fluorescence Detection of Virus: Optimization of Model Study.","authors":"Hind A Al-Shwaiman, Rustem R Zairov, Asad Syed, Manjula Subramaniam, Meenakshi Verma, Baadal Jushi Janani, Ramadan Fallah Amer","doi":"10.1007/s10895-024-04042-8","DOIUrl":"https://doi.org/10.1007/s10895-024-04042-8","url":null,"abstract":"<p><p>The onset of the coronavirus has highlighted the critical need to swift diagnostic techniques to identify the virus. Metal Organic Frameworks (MOFs) have attracted considerable attention in the field of sensing due to the remarkable characteristics. The present research examines the microwave preparation of naphthalimide-functionalized zeolitic imidazolate framework-8 (NI/ZIF-8) to the detection of coronavirus as a probe. The microwave synthesis approach facilitates an environmentally sustainable, and effective production of NI/ZIF-8. Characterization techniques have validated the material's high crystallinity and thermal behaviour. In order to enhance the performance of the probe, a 2<sup>3</sup> factorial model is implemented. This model facilitates the influences of control parameters, including NI/ZIF-8 dose, solution temperature, and buffer pH, on quenching response. The findings indicate the 27 °C, pH 8.2, and a NI/ZIF-8 dose of 0.6 mg/mL yields the maximum quenching response (83.21%). Additionally, it has been determined that photo electron transfer plays a significant role within the quenching process. The sensor demonstrated remarkable sensitivity to the COVID-19 RNA, achieving an exceptionally detection limit of 5.45 pM and a quick sense (20 min), alongside a high detection selectivity of RNA. This project underscores the applicability of NI/ZIF-8 as an effective and eco-friendly sustainable substance for the rapid and accurate detection of RNA of COVID-19.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shrouk Farouk, Amany Farouk, Nabil El-Faramawy, Nancy N Elewa
{"title":"Phase-Dependent Thermoluminescence Properties of Zinc Sulphide.","authors":"Shrouk Farouk, Amany Farouk, Nabil El-Faramawy, Nancy N Elewa","doi":"10.1007/s10895-024-04050-8","DOIUrl":"https://doi.org/10.1007/s10895-024-04050-8","url":null,"abstract":"<p><p>In the current study, the effects of heat treatment on the thermoluminescence (TL) and structural properties of zinc blend samples were studied. The samples were annealed after being heated for different time periods from 2 up to 10 h. The wurtzite hexagonal phase was observed upon heat treatment. It was observed that the presence of hexagonal phase with small percentage enhanced the thermoluminescence effect where the highest intensity was found to be for the sample with 8.2% wurtzite and 91.8% cubic zinc sulphide. The morphology of ZnS particles was studied by the HR-TEM analysis and it displayed an aggregated ZnS nanoparticles with almost uniform shape and size. The TL-glow curves for each sample were analysed using the Computerized Glow Curve Deconvolution (CGCD) and initial rise (IR) methods. Six trapping peaks exist between 0.98 and 1.45 eV through the deconvolution process. The number of peaks increased to 8 peaks for the fourth treatment, located between 0.95 and 1.56 eV. The activation energies and the frequency factors for getting traps were evaluated too.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Khitam Alsaedi, Abdulameer Imran, Hussain A Badran, Riyadh Ch Abul-Hail, Khalid I Ajeel
{"title":"Profile distribution, Z-scan technique, Optical limiting and thermal lens method studies on Cyanidin-3-O-glucoside chloride.","authors":"Khitam Alsaedi, Abdulameer Imran, Hussain A Badran, Riyadh Ch Abul-Hail, Khalid I Ajeel","doi":"10.1007/s10895-024-04027-7","DOIUrl":"https://doi.org/10.1007/s10895-024-04027-7","url":null,"abstract":"<p><p>For the purpose of determining the characteristics of the Cyanidin-3-O-glucoside chloride (COGC) dye, both an FT-IR spectrometer and a UV-Visible spect rometer were employed through the process. At a wavelength of 473 nm, a diode-pumped solid-state (DPSS) laser with an adjustable wavelength was used to quantify the thermally induced optical nonlinearity of the dye in a solvent composed of dimethylformamide. For the purpose of measuring the optical response, the Z-scan technique was utilised. The dye showed negative and large nonlinear index of refraction values, with high nonlinear absorption coefficients. The nonlinear index of refraction ( <math><msub><mi>n</mi> <mn>2</mn></msub> </math> ) and nonlinear absorption coefficient (β) of the COGC/PMMA film were measured to be 110.55 × 10<sup>7</sup> cm<sup>2</sup>/W and 136.35 × 10<sup>-3</sup> cm/W. Thermal lens technique was used to investigate thermo-optical properties and <math><msub><mi>n</mi> <mn>2</mn></msub> </math> . The optical limiter capabilities of the COGC dye are being investigated as a potential use.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142769494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V Sivakumar, Arunachalam Lakshmanan, L Sangeetha, J Nandhagopal, G Annadurai, R Sangeetha Rani, S Saravanakumar
{"title":"Effect of Flux and Co-doping on Photoluminescence Properties of Zn<sub>2</sub>SiO<sub>4</sub>:Eu<sup>3+</sup> Red Phosphors for Blue LED Excitable White LED Applications.","authors":"V Sivakumar, Arunachalam Lakshmanan, L Sangeetha, J Nandhagopal, G Annadurai, R Sangeetha Rani, S Saravanakumar","doi":"10.1007/s10895-024-04048-2","DOIUrl":"https://doi.org/10.1007/s10895-024-04048-2","url":null,"abstract":"<p><p>Eu<sup>3+</sup> activated Zn<sub>2</sub>SiO<sub>4</sub> red phosphor synthesized by pyrolysis technique at 1000ºC for one hour is reported. Upon excitation by 394 nm and 464 nm, the phosphor displays a distinct red emission peaking around 614 nm, a characteristic of f-f electronic transitions involving Eu<sup>3+</sup> ions.Incorporating alkali metal ions such as Li<sup>+</sup>, Na<sup>+</sup> and K<sup>+</sup> into Zn<sub>2</sub>SiO<sub>4</sub>:Eu<sup>3+</sup> phosphor led to a remarkable increase in photoluminescence (PL) intensity. The maximum PL intensity of Zn<sub>2</sub>SiO<sub>4</sub>:Eu<sup>3+</sup> was obtained with Li<sup>+</sup> added since its ionic size (0.68 Å) matched well with that of Zn<sup>2+</sup> (0.76 Å) cation when compared to that of Na<sup>+</sup> (0.97 Å) and K<sup>+</sup> (1.33 Å). Zn<sub>2</sub>SiO<sub>4</sub>:Eu<sup>3+</sup>,Li<sup>+</sup> exhibits 45% higher PL sensitivity than orange-red emitting (Y,Gd)BO<sub>3</sub>:Eu<sup>3+</sup> commercial phosphor. This makes it a highly efficient choice for utilization as a red-emitting phosphor, offering improved color chromaticity suitable for applications in displays, and near-ultraviolet and blue LED-based white LEDs.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142739589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of Preparation Technology for PET-Based Carbon Dots by Response Surface Method and Its Application.","authors":"Chaohui Ma, Gaoling Jin, Puzhen He, Chuanjiang Tang, Linhan Bing, Botong Liu, Hanjiang Huang, Yu Fan, Rui Wang, Jianfei Wei","doi":"10.1007/s10895-024-04037-5","DOIUrl":"https://doi.org/10.1007/s10895-024-04037-5","url":null,"abstract":"<p><p>The preparation of polyethylene terephthalate(PET)-based Carbon Dots (PET-CDs) using one-step hydrothermal method with PET waste, pyromellitic acid (PMA) and ammonia (NH<sub>3</sub>·H<sub>2</sub>O) as precursors is a high-value utilization strategy for PET waste, offering significant application potential. To achieve efficient recycling of PET waste, response surface methodology was adopted for to optimize the precursor ratio during the synthesis of PET-CDs with fluorescence quantum yield (QY) as the key performance indicator. The optimal preparation conditions were determined to be: 1.180 g of PET, 3.287 g of PMA, 8.969 mL of NH<sub>3</sub>·H<sub>2</sub>O, a reaction temperature of 260 °C, and a reaction time of 12 h. The as-prepared PET-CDs exhibit excitation-independent emission properties in the range from 360 nm to 440 nm, with the optimal excitation wavelength of 410 nm and the optimal emission wavelength was 485 nm, resulting in a QY of 83.34%. Structurally, PET-CDs exhibit a spherical morphology, featuring amino and carboxyl groups on their surface, with the particle size ranging from 1.61 to 4.92 nm and an average particle size of 2.88 nm. The prepared PET-CDs can be utilized in light-blocking films (LBFs) and fluorescence anti-counterfeiting technologies. The intensity of light passing through the LBFs significantly is decreased in the ultraviolet and blue light wavelength ranges, with performance comparable to commercial anti-blue light glasses. Additionally, the PET-CDs solution can be adopted for printing patterns that are visible under ultraviolet excitation and are not visible in visible light, demonstrating that PET-CDs can be employed in fluorescence anti-counterfeiting measures.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142715943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jomy Jose Philip, Aishwarya C S, Nagaraju Kottam, Chandan Hunsur Ravikumar, R Geetha Balakrishna
{"title":"Reliability of Multi-Emissive Carbon Quantum Dots for Multiplexing; Assessing the Figures of Merit.","authors":"Jomy Jose Philip, Aishwarya C S, Nagaraju Kottam, Chandan Hunsur Ravikumar, R Geetha Balakrishna","doi":"10.1007/s10895-024-04041-9","DOIUrl":"https://doi.org/10.1007/s10895-024-04041-9","url":null,"abstract":"<p><p>Incredible properties of quantum dots (QDs) have once again been acclaimed with this year's (2023) Nobel prize in chemistry. On the other hand, the invention of multicolour molecular imaging of cell surface receptors for tumour diagnosis by Koyama and group has opened up a new era in diagnostics. Among them carbon quantum dots (CQDs) are interesting class of fluorescent nanomaterials, superior in terms of low toxicity, high solubility and biocompatibility along with simple and cost-effective synthesis processes unlike the traditional metal chalcogenide or perovskite quantum dots. Multi emissive fluorescence property of these carbon quantum dots are very useful in multiplex sensing. Their excellent biocompatibility and low toxicity have attracted researchers to use them extensively for biosensing and imaging of multiple analytes at a time. Core state emission from π-domains and surface state emissions of functional groups surrounding CQDs play a major role in achieving the multicolour emissions and this review discusses the various strategies used to achieve desired multi colour emissions, yet preserving their stability, non-interactive emissive states and quantum yields. Their fine tuning via variation in temperature, pH, time, and heteroatom doping has been comprehensively discussed. A thorough history compared to a list of characteristics for creating effective multicolour CQDs will point us in the proper route. This minireview also assesses the electronic band structure of these multicolour CQDs, their stability with respect to multi emissions, photoluminescence quantum yields, approaches employed for tunability of their optical band gaps, and also enhancement of carrier lifetimes, to arrive at conclusions on the reliability of these materials for multiplexing. The mechanisms namely chemical coupling, FRET, On-Off, Ab-antigen interactions involved in sensing mechanisms involving these materials are analysed in depth. Ultimately, the present obstacles and future directions for the use of these CQDs in sensing applications are discussed.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142716082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Luminescence Behavior and Structural Characteristics of Novel BaYAl<sub>3</sub>O<sub>7</sub>: Tb<sup>3+</sup> Nanophosphors.","authors":"Diksha Rani, Anil Kumar, Dinesh Kumar","doi":"10.1007/s10895-024-04024-w","DOIUrl":"https://doi.org/10.1007/s10895-024-04024-w","url":null,"abstract":"<p><p>An innovative green emitting novel BaY<sub>1 - x</sub>Tb<sub>x</sub>Al<sub>3</sub>O<sub>7</sub> (x = 0.02, 0.03, 0.04, 0.05, and 0.06) was synthesized using urea combustion, which was a low-energy process. Using techniques such as photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive x-ray (EDX) spectroscopy, the structure and luminous properties of the phosphor were investigated. Scherrer's equation was utilized in the XRD technique to determine the crystallite size of the suggested materials. When stimulated with the near-ultraviolet photon, PL spectra revealed intense green emission at 541 nm (<sup>5</sup>D<sub>4</sub> → <sup>7</sup>F<sub>5</sub>). The composition with the maximum emission intensity is BaY<sub>0.96</sub>Tb<sub>0.04</sub>Al<sub>3</sub>O<sub>7</sub>. The dipole-dipole mechanism for concentration quenching events was identified with the help of the critical energy transfer distance. The non-radiative relaxation rate (276 s<sup>- 1</sup>), radiative lifetime (0.75754 ms), and quantum efficiency (79%), of the ideal phosphor composition are calculated using Auzel's model. The color coordinates (0.260, 0.496) align with the emission of green light. The remarkable outcomes validated the significance of the targeted nanocrystals as a superior material with prospective applications in solid-state down-converted white light-emitting diodes (WLEDs).</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142710358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}